CN108781043A - Power transformation circuit - Google Patents
Power transformation circuit Download PDFInfo
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- CN108781043A CN108781043A CN201780016281.1A CN201780016281A CN108781043A CN 108781043 A CN108781043 A CN 108781043A CN 201780016281 A CN201780016281 A CN 201780016281A CN 108781043 A CN108781043 A CN 108781043A
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-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
- H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
- H03K17/165—Modifications for eliminating interference voltages or currents in field-effect transistor switches by feedback from the output circuit to the control circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/785—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling field-effect transistor switches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Light receiving circuit (15) receives the light generated by illumination region (18), generates electric signal, that is, power on signal of the intensity based on light.Holding circuit (14) is configured to, when control circuit (16) sends cut-off signal, supply high potential terminal (20A) charge of power on signal, also, reduce the voltage of high potential terminal (20A).In turn, holding circuit (14) is configured to, when control circuit (16) sends and connects signal, not supply high potential terminal (20A) charge of power on signal, also, maintain the voltage of high potential terminal (20A).Comparison circuit (13) is compared comparison signal and reference signal, generates the bias voltage based on result obtained from being compared to comparison signal and reference signal, bias voltage is fed back as reference signal.Driving circuit (12) supplies bias voltage when control circuit (16) sends cut-off signal, to reference terminal (17B).
Description
Technical field
The present invention relates to the power transformation circuits used in various electronic instruments.
Background technology
Hereinafter, being illustrated to previous power transformation circuit using attached drawing.Fig. 5 is to indicate that using previous electric power becomes
Change the circuit module figure of the structure of the power-converting device 2 of circuit 1.Power transformation circuit 1 has low side switch 3, driving circuit
4, detection circuit 5 and switching circuit 6.In addition, the power transformation circuit 8 with high-side switch 7 is in parallel with power transformation circuit 1 even
It connects.Here, showing an example that power transformation circuit 1 configures to be used in the downside of power-converting device 2.
In power-converting device 2, high-side switch 7 and low side switch 3 alternately switch on and off repeatedly, to which electric power becomes
It changes circuit 8 and power transformation circuit 1 is acted.Alternately output is based on power transformation circuit 8 to leading-out terminal 9 repeatedly as a result,
Positive potential output and based on power transformation circuit 1 negative potential output.That is, 9 output AC voltage of leading-out terminal.
In addition, driving circuit 4 controls switching on and off for low side switch 3, so that high-side switch 7 and low side switch 3 are not
It can be also turned on.This is the perforation electric current generated due to high-side switch 7 and low side switch 3 are also turned in order to prevent.In turn, it examines
Slowdown monitoring circuit 5 detects the output voltage of power transformation circuit 8.Moreover, the output voltage in power transformation circuit 8 is defined threshold value
In the case of above, detection circuit 5 controls switching circuit 6, so that low side switch 3 will not be connected.
In addition, as with the relevant citation information of present invention, such as known patent document 1.
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2015-23774 bulletins
Invention content
In previous power transformation circuit 1, closed loop L is formed by detection circuit 5, switching circuit 6 and low side switch 3.?
The noise generated outside closed loop L is easy intrusion closed loop L.Therefore, detection circuit 5, switching circuit 6 or low side switch 3 are possible to
It is influenced by noise in action.
As a result, the action of low side switch 3 becomes unstable, perforation electric current is will produce, therefore there are low side switch 3, height
The possibility that the service life of side switch 7 deteriorates.
Thus, it is difficult to by the influence for carrying out self noise after steadily in the long term the object of the present invention is to provide a kind of
The power transformation circuit acted.
Moreover, in order to realize the purpose, power transformation circuit according to the present invention has control circuit, electric power switch
Element, driving circuit, light receiving circuit, holding circuit and comparison circuit.Control circuit alternately sends cut-off signal and connects repeatedly
Messenger.Electric power switch element has control terminal, reference terminal and the illumination region to shine according to electrical current.Driving electricity
Road is connect with control terminal and reference terminal, driving power switch element.Light receiving circuit receives the light generated by illumination region,
Generate electric signal, that is, power on signal of the intensity based on light.Holding circuit has the comparison signal capacitance comprising high potential terminal
Device.Holding circuit is configured to when control circuit sends cut-off signal, to the charge of high potential terminal feeding power on signal, and
And the voltage of high potential terminal is not made to reduce.In turn, holding circuit is configured to when control circuit sends and connects signal, not right
The charge of high potential terminal feeding power on signal, also, maintain the voltage of high potential terminal.Holding circuit supplies high potential terminal
Voltage as comparison signal.Comparison circuit is compared comparison signal and reference signal, generate based on to comparison signal and
The bias voltage of result obtained from reference signal is compared, and bias voltage is fed back as reference signal.Driving electricity
Road supplies bias voltage when control circuit sends cut-off signal, to reference terminal.
According to the present invention, though it is very short if being misquoted during arc misquotes arc persistently by the generation of electric power switch element, and
And the generation frequency for misquoting arc is also less, continuously misquoting arc generation is inhibited.Therefore, the action of electric power switch element
Stablize, and perforation electric current is limited to generate in a shorter period once.
As a result, the action of power transformation circuit is difficult to be influenced by from external noise.Further, it is difficult in electric power
Perforation electric current is generated in translation circuit.Therefore, electric power can be after being acted with switch element steadily in the long term, and electric power
It being capable of long lifetime with switch element.
Description of the drawings
Fig. 1 is the circuit module figure of the structure for the power transformation circuit for indicating embodiments of the present invention.
Fig. 2 is the circuit mould for indicating to have the structure of the DC-to-AC converter of the power transformation circuit of embodiments of the present invention
Block diagram.
Fig. 3 is the sequence diagram of the action for the power transformation circuit for indicating embodiments of the present invention.
Fig. 4 is the schematic sectional view of the electric power switch element of embodiments of the present invention.
Fig. 5 is the circuit module figure for the structure for indicating previous power transformation circuit.
Specific implementation mode
Hereinafter, using attached drawing, embodiments of the present invention will be described.
(embodiment)
Fig. 1 is the circuit module figure of the structure for the power transformation circuit 10 for indicating embodiments of the present invention.
Power transformation circuit 10 include control circuit 16, electric power switch element 11, driving circuit 12, light receiving circuit 15,
Holding circuit 14 and comparison circuit 13.
Control circuit 16 alternately sends the control of the control signal (cut-off signal) and turn-on level that disconnect level repeatedly
Signal (connects signal).
Electric power switch element 11 has control terminal 17A, reference terminal 17B, according in electric power switch element 11
The luminous illumination region 18 of the electrical current of flowing.In the present embodiment, electric power switch element 11 is with control terminal 17A
As gate terminal 11G and there is field-effect transistors of the reference terminal 17B as source terminal 11S.In addition, in this embodiment party
In formula, electrical current is drain current or grid current in electric power switch element 11.In addition, in the present embodiment, hair
Light portion 18 is in electric power switch element 11, is formed in PN junction portion 33 between drain-source or between gate-source.
Driving circuit 12 is connect with control terminal 17A and reference terminal 17B, is sent and is driven with switch element 11 to electric power
Signal.That is, driving circuit 12 driving power switch element 11.
Light receiving circuit 15 receives the light generated by illumination region 18, generates electric signal, that is, power on signal of the intensity based on light.
Holding circuit 14, which has, includes the comparison signal electricity container 20 including high potential terminal 20A.14 structure of holding circuit
As when control circuit 16 sends the control signal for disconnecting level, the charge of power on signal is supplied to high potential terminal 20A, and
And the voltage of high potential terminal 20A is not made to reduce.In turn, holding circuit 14 is configured to send turn-on level in control circuit 16
Control signal when, the charge of power on signal is not supplied to high potential terminal 20A, also, maintain the electricity of high potential terminal 20A
Pressure.Holding circuit 14 supplies the voltage of high potential terminal 20A as comparison signal.
Comparison circuit 13 is compared comparison signal and reference signal, generate based on to comparison signal and reference signal into
The bias voltage of result, bias voltage is fed back as reference signal obtained from row compares.
Bias voltage is supplied to reference edge by driving circuit 12 when control circuit 16 sends the control signal for disconnecting level
Sub- 17B.
By above structure and action, electric power can be after being acted with switch element 11 steadily in the long term.Cause
This, electric power switch element 11 being capable of long lifetime.
That is, as below be described in detail as, the control signal sent out from control circuit 16 be disconnect level when, by
Electric power switch element 11 is set to cause to misquote arc to produce in being added to control signal, drive signal etc. from external noise
In the case of having given birth to perforation electric current, perforation electric current is inhibited.Here, when electric power switch element 11 has occurred and misquotes arc,
Bias voltage corresponding with the voltage of power on signal generated due to misquoting arc quilt during the disconnection level of control signal
It is attached to drive signal.Driving circuit 12 being capable of more accurately driving power switch element 11 as a result,.
In other words, when it is to disconnect level to control signal, pass through the connection of switch element 11 of unnecessary electric power
(turn on) (striking) and the perforation electric current that generates can become triggering, the later generation for misquoting arc, along with misquoting passing through for arc
Galvanization is inhibited.
As a result, the action of power transformation circuit 10 is difficult to be influenced by from external noise.Further, it is difficult to generate
The continuous or interrupted perforation electric current in power transformation circuit 10.Therefore, electric power switch element 11 can be after long-term steady
Surely it is acted, and electric power switch element 11 being capable of long lifetime.
Hereinafter, being described in detail for power transformation circuit 10.Fig. 2 is to indicate have in embodiments of the present invention
Power transformation circuit 10 DC-to-AC converter 21 structure circuit module figure.Fig. 3 is to indicate in embodiments of the present invention
Power transformation circuit 10 action sequence diagram.
DC-to-AC converter 21 have the high side being connect with direct current positive potential power transformation circuit 10 and with direct current negative electricity
The power transformation circuit 10 of the downside of position connection.The power transformation circuit 10 of high side alternately exports 0 and+V, and the electric power of downside becomes
It changes circuit 10 and alternately exports 0 and-V.Moreover, DC-to-AC converter 21 is alternately exported from Inverter output terminal 22 is based on high side
Power transformation circuit 10+V and power transformation circuit 10 based on downside-V.
In this way, the power transformation circuit 10 of high side and the power transformation circuit 10 of downside alternately export 0 He repeatedly respectively
Provide current potential.Therefore, when the electric power of the power transformation circuit of high side 10 is in the conduction state with switch element 11, the electricity of downside
The electric power of force transformation circuit 10 becomes nonconducting state with switch element 11.Moreover, each electric power with switch element 11 alternately
Conduction and non-conduction repeatedly.Therefore, in DC-to-AC converter 21, under common action state, without downside
Electric power switch element 11 and 11 both sides of the electric power of high side switch element become conducting state control.
Here, the power transformation circuit 10 of the power transformation circuit 10 of high side and downside is other than polarity difference this point
With same structure, and it is carried out similarly action.Thus, in the following description, using the power converter electricity of downside
Road 10.Moreover, Fig. 3 mainly indicates the sequence diagram of the power transformation circuit 10 of downside.
As described above, the electric power switch element 11 of high side and the electric power switch element 11 of downside pass through drive
Dynamic signal and alternately on-off repeatedly.Drive signal by driving circuit 12 be based on from each electric power switch element 11
The turn-on level or disconnect the control signal of level to generate that corresponding control circuit 16 is sent out.Here, the control of high side
The control signal of signal and downside mutually inverts.
Here, first, it is equal to which electric power switch element 11 does not draw to illustrate that noise is not mixed into power transformation circuit 10
Act the state acted with misquoting arc.
If sending the control signal of turn-on level from control circuit 16, switched from driving circuit 12 to the electric power of downside
The control terminal 17A of element 11 sends out the drive signal of the voltage of threshold voltage vt h or more between gate-source, then electric power switch
Element 11 becomes conducting state.In other words, drain current or grid current are flowed as electrical current.In particular, in electricity
Power is with, using in the case of gallium nitride semiconductor (GaN semiconductors), grid current is flowed as electrical current in switch element 11
It is dynamic.It is accompanied by this, illumination region 18 shines.If the acceptance part 15A of light receiving circuit 15 detects the light that illumination region 18 is sent out, by
Optical circuit 15 generates power on signal.Light receiving circuit 15 sends power on signal to holding circuit 14.In addition, power on signal for example it is above-mentioned that
Sample follows shining for illumination region 18.Therefore, the waveform of power on signal substantially with the synchronous waveform of drive signal.
Here, the luminous intensity and electric power in illumination region 18 are big with the size of the electrical current flowed in switch element 11
Cause proportionally changes.In addition, the voltage of the power on signal generated by light receiving circuit 15 and the luminous intensity in illumination region 18
Change generally proportionately.
Holding circuit 14 have connect with light receiving circuit 15 update diode 19 and update diode 19 cathode and
The update switch 23 configured between high potential terminal 20A.Power on signal is by light receiving circuit 15 from the update two of holding circuit 14
Pole pipe 19 is sent via update switch 23 to the high potential terminal 20A of comparison signal electricity container 20.It should be noted that also may be used
The electronic units such as configuration resistance between the cathode and update switch 23 of update diode 19.It similarly, also can be in hot end
The electronic units such as configuration resistance between sub- 20A and update switch 23.
It is synchronous with the disconnection level switch 24 of driving circuit 12, turn-on level switch 27 to update switch 23.In turn-on level
When switch 27 is opened and disconnects the closure of level switch 24, update switch 23 is closed.Moreover, being closed and breaking in turn-on level switch 27
When opening the opening of level switch 24, update switch 23 is opened.Turn-on level switch 27 and the opening for disconnecting level switch 24 are closed
It is controlled by control circuit 16.That is, holding circuit 14 is configured to, when control circuit 16 sends the control signal for disconnecting level, be closed
Update switch 23.In addition, holding circuit 14 is configured to, when control circuit 16 sends the control signal of turn-on level, open update
Switch 23.
It disconnects level switch 24 and is correspondingly closed with the disconnection level for controlling signal, the turn-on level phase with control signal
Accordingly open.When updating the closure of switch 23, generally opened level switch 24 is closed.It is worth as a result, than threshold value between gate-source
Gate source voltage across poles Vgs low voltage Vth is fed into electric power switch element 11.Therefore, electric power with switch element 11 at
For nonconducting state, light receiving circuit 15 does not send power on signal.Therefore, not from light receiving circuit 15 to comparison signal electricity container 20
Supply charge.That is, maintaining the current potential of high potential terminal 20A.
Comparison signal electricity container 20 has high potential terminal 20A and terminal 20B.Here, the current potential of high potential terminal 20A
(potential difference of high potential terminal 20A and terminal 20B) is set to the first current potential.But as explained later like that, high electricity
The current potential of position terminal 20A is during power transformation circuit 10 is acted, since electric power switch element 11 causes to misquote arc
And it is updated frequently.Therefore, also can will be in power converter electricity as the first potential setting of the current potential of high potential terminal 20A
Become 0 current potential when road 10 starts, is used as the state of the not no charge of comparison signal electricity container 20.
Turn-on level switch 27 is correspondingly closed with the turn-on level of control signal, the disconnection level phase with control signal
Accordingly open.When updating the opening of switch 23, usual turn-on level switch 27 is closed.It is worth as a result, than threshold value between gate-source
The gate source voltage across poles Vgs of voltage Vth high is supplied to electric power switch element from the positive supply 30 for being set to driving circuit 12
11.Therefore, electric power switch element 11 becomes conducting state, and light receiving circuit 15 sends power on signal.At this point, 23 dozens, switch of update
It opens, therefore even if light receiving circuit 15 sends power on signal, will not be supplied from light receiving circuit 15 to comparison signal electricity container 20
Charge.That is, maintaining the current potential of high potential terminal 20A.
T1 pervious periods in the sequence diagram of Fig. 3 be equivalent to more than state.Before t1, high potential terminal 20A's
Current potential maintains the first initial current potential always.In other words, electric power does not cause to be acted with misquoting arc with switch element 11.
The current potential of high potential terminal 20A is transmitted to comparison circuit 13 as comparison signal from holding circuit 14.Comparison circuit
13 with comparator 28, compare switch 29 and compared with switch 29 connection biasing resistor 32.Previously described comparison signal quilt
It is input to the comparator 28 of comparison circuit 13.The output signal of comparator 28, which be used to control, compares switch 29.Compare switch 29
Output be fed into driving circuit 12 as bias voltage.Bias voltage is made especially when it is to disconnect level to control signal
For the potential difference generated at the both ends of biasing resistor 32, it is fed into electric power switch element 11.In addition, bias voltage be used as than
Reference signal compared with device 28 is fed back to comparator 28.
If the current potential of high potential terminal 20A is 0 initial potential level, the current potential of comparison signal is unlike comparator 28
Reference signal current potential it is high.That is, comparator 28 does not send output signal.Therefore, comparing switch 29 becomes nonconducting state, partially
Resistance 32 is set not connect with negative supply 31.That is, not generating potential difference in biasing resistor 32.The state also corresponds in sequence diagram
T1 pervious periods.Therefore, when it is to disconnect level to control signal, bias voltage 0V, therefore from driving circuit 12 to electricity
The gate source voltage across poles Vgs that power switch element 11 supplies becomes 0V.In turn, when it is turn-on level to control signal, from drive
The gate source voltage across poles Vgs that dynamic circuit 12 is supplied to electric power switch element 11 becomes the+Vb0 based on positive supply 30.At this point,
Bias voltage is not used.
T1 pervious periods in the timing diagram in fig. 3, when it is to disconnect level to control signal, gate source voltage across poles
Vgs is 0V.That is, being equivalent to the gate terminal 11G of control terminal 17A and being equivalent to the electricity of the source terminal 11S of reference terminal 17B
Potential difference becomes 0V.Therefore, electric current without flow through electric power between the drain terminal 11D in switch element 11 and source terminal 11S.
In addition, when it is turn-on level to control signal, gate source voltage across poles Vgs is+Vb0.That is, being equivalent to control terminal
The gate terminal 11G of 17A and be equivalent to reference terminal 17B source terminal 11S potential difference than threshold voltage between gate-source
Vth high.Therefore, electric current flows between the drain terminal 11D and source terminal 11S of electric power switch element 11.
In other words, the value Vu of the hot side of gate source voltage across poles Vgs when control signal is turn-on level is set
It is set to+Vb0.Control signal is that the value Vd of the low potential side of gate source voltage across poles Vgs when disconnecting level is set to 0V.By
This, the power transformation circuit 10 of downside alternately exports 0 and-V.
As previously described, t1 discussed above pervious periods are especially turn-on level in control signal
In the case of disconnecting level the two, it is equivalent to the shape that power transformation circuit 10 is not mixed into from external noise etc.
State.On the other hand, when control signal especially disconnects level, sometimes due to being superimposed on control letter from external noise
Number, drive signal etc. and make electric power switch element 11 cause to misquote arc.At this point, generating perforation electricity in power transformation circuit 10
Stream.Action below for power transformation circuit 10 in this case illustrates.
Here, when it is turn-on level to control signal, update switch 23 is opened.Meanwhile turn-on level switch 27 is closed
It closes and supplies drive signal from positive supply 30 to electric power with switch element 11.Thus, even if being mixed into from external noise etc.
In the case of power transformation circuit 10, electric power is also hardly influenced by carrying out self noise with switch element 11.
Here, for example, if being superimposed on drive signal, grid from external noise at the time of t1 in sequence diagram
It is pulse type that voltage between source electrodes Vgs is erected to positive potential side.If gate source voltage across poles Vgs surmounts threshold value electricity between gate-source
Vth is pressed, then electric power switch element 11 becomes conducting state from nonconducting state.Moreover, being flowed in switch element 11 in electric power
Dynamic electrical current.
At the same time, the illumination region 18 of electric power switch element 11 shines.Also, it is corresponding with shining for illumination region 18
Ground, light receiving circuit 15 generate power on signal.As previously mentioned, at the time of the state is equivalent to the t1 in sequence diagram.At this point, control letter
Number to disconnect level, therefore the update switch 23 of holding circuit 14 is closed.Therefore, the voltage rising in power on signal can make
T1 rose as the current potential of the high potential terminal 20A of the comparison signal electricity container 20 of the first current potential in the past.Moreover, after rising
First current potential is maintained as updated first current potential by comparison signal electricity container 20.In turn, due to high potential terminal 20A's
First current potential rises, thus the current potential of comparison signal rises.Here, reference signal of the current potential of comparison signal than comparator 28
Current potential is high, therefore the voltage of the output signal of comparator 28 also rises.Moreover, comparing switch 29 from non-conduction shape so far
State is switched to conducting state.
Connect as a result, with negative supply 31 due to biasing resistor 32, biasing resistor 32 generate based on negative supply 31-
The potential difference of Vb1.The source terminal 11S and gate terminal 11G of electric power switch element 11 are via biasing resistor 32 and disconnect electricity
Pass 24 is opened flat to be connected.As above, comparison circuit 13 is compared comparison signal and reference signal, will be based on to comparing letter
Number and reference signal be compared obtained from the output of comparison switch 29 of result be generated as bias voltage.Driving circuit 12 will
Bias voltage is supplied to source terminal 11S.Therefore, relatively the current potential than source terminal 11S becomes the current potential of gate terminal 11G
It is low.As a result, at the time of t1, due to noise, to which gate source voltage across poles Vgs becomes than threshold voltage between gate-source
Vth high, corresponding, at the time of t2, gate source voltage across poles Vgs is reduced to-Vb1.
Therefore, from t2 at the time of play until control signal is switched to turn-on level, gate source voltage across poles Vgs displacement
To negative side.In addition, threshold voltage vt h is the value being fixed between gate-source.Therefore, along with gate source voltage across poles Vgs
It is displaced to negative side, gate source voltage across poles Vgs is after t2 less than threshold voltage vt h between gate-source.Electric power switchs as a result,
Element 11 is connected at the time of t1 after (turn on), cuts off (turn off) at the time of t2 immediately.Therefore, believe in control
Number in during disconnecting level, being equivalent to electric power switch element 11 during drain-source current Ids flowing becomes conducting
During t1 to the t2 of state.
In turn, be superimposed noisy power on signal from t1 at the time of until t2 at the time of make comparison signal electricity container 20
High potential terminal 20A current potential rise.The charge of comparison signal electricity container 20 after increase exists.Therefore, because
The output voltage of comparator 28 continues as the state risen, therefore compares switch 29 and continue as conducting state.
Gate source voltage across poles Vgs becomes-Vb1 as a result,.That is, gate source voltage across poles Vgs continues compared with keeping when 0V
Deeper negative biasing is constant, and driving circuit 12 is supplied to from comparison circuit 13.Moreover, gate source voltage across poles Vgs maintenances-
The state of Vb1 will continue to as described previously
Only.Moreover, under the timing, gate source voltage across poles Vgs is switched to the value Vu of hot side from negative side.
Here, during controlling signal from until disconnection at the time of level is switched on level, such as in t3
At the time of, even if gate source voltage across poles Vgs small gate source voltage across poles Vgs than being generated at the time of t1 is due to others
Noise and generate, be also difficult to generate perforation electric current in power transformation circuit 10.Gate source voltage across poles Vgs (- Vb1) with
It is generated on the basis of the current potential for the high potential terminal 20A that the size of the noise generated at the time of t1 correspondingly generates.Therefore, i.e.,
The low noise of the noise or the noise than being generated at the time of t1 that keep the noise for being with being generated at the time of t1 same is superimposed on grid
Gate source voltage across poles Vgs at the time of pole voltage between source electrodes Vgs, t3 will not reach threshold voltage vt h between gate-source.Cause
This, electric power maintains nonconducting state with switch element 11.
Alternatively, although it is not shown, still until te at the time of until during produce than being generated at the time of t1
In the case of gate source voltage across poles Vgs big gate source voltage across poles Vgs, gate source voltage across poles Vgs can due to-Vb1
It is further shifted to negative side compared to deeper negative biasing.Moreover, what gate source voltage across poles Vgs was further shifted to negative side
State will continue to until at the time of controlling signal and be switched on the te of level from disconnection level.
In addition, holding circuit 14 has update diode 19 and update switch 23.Holding circuit 14 can continue to tie up as a result,
Hold the charge of the previously described comparison signal electricity container 20 accumulated along with the size of noise.That is, 14 structure of holding circuit
As when control circuit 16 sends the control signal for disconnecting level, reduce the voltage of high potential terminal 20A.In addition, protecting
Circuit 14 is held to be configured to, when control circuit 16 sends the control signal of turn-on level, maintain the voltage of high potential terminal 20A.Cause
This, when the turn-on level state of the control signal started at the time of te is switched to again disconnects level state (not shown),
Gate source voltage across poles Vgs is from most from the beginning of being set to-Vb1.
As above, when electric power switch element 11 misquotes arc due to being had occurred from external noise, illumination region
18 send out the light for the influence for being difficult to the noise by electromagnetism.Moreover, generating opposite with the intensity of light generated due to misquoting arc
The bias voltage answered.Bias voltage is fed into source terminal 11S during the disconnection level of control signal.That is, driving circuit
12, when control circuit 16 sends the control signal for disconnecting level, make the current potential of source terminal 11S compare grid according to bias voltage
The current potential of extremely sub- 11G more rises.The bad influence that power transformation circuit 10 is subject to from noise as a result, is suppressed, control circuit 16
Electric power switch element 11 can be more accurately controlled.In other words, even if produce at the time of than from t1 to t2
During it is longer during continue the noise occurred, influence caused by noise to be also defined to from t1 at the time of to t2 at the time of
During.Moreover, from t1 at the time of to being to contain comparator 28 during at the time of t2, compare comparison including switch 29
During circuit 13 is acted, and during being very short.
As a result, the action of power transformation circuit 10 is difficult to be influenced by from external noise.In addition, by electric power
It is produced with switch element 11 when misquoting arc, it is rear additional to misquoting arc to driving circuit 12 in comparison operation required period
The bias voltage inhibited.Accordingly, it is difficult to generate the perforation electric current of continuation in power transformation circuit 10.
In addition, during controlling signal as level is disconnected, the depth of bias voltage is according to 10 institute of power transformation circuit
The size for the noise being subject to and updated successively.As a result, during disconnecting level, noise repeatedly generates, and makes an uproar when with initial
When sound becomes larger compared to subsequent noise, the bias voltage applied to driving circuit 12 due to subsequent noise can be by comparing electricity
Road 13 is acted and is further deepened.In addition, by the bias voltage generated due to initial noise, subsequent noise institute
The influence brought is inhibited in advance.Therefore, in the case where multiple noises continuously or sporadically generate, perforation electric current also by
Inhibit into and generates with smaller level in a shorter period or be suppressed to sporadically generate.
As a result, electric power with switch element 11 after being acted steadily in the long term, and electric power 11 energy of switch element
Enough long lifetimes.
In addition, the electric power that Fig. 4 is the power transformation circuit 10 of embodiments of the present invention is cutd open with the signal of switch element 11
View.As long as the luminous intensity of 11 illumination region 18 of electric power switch element and the size of electrical current correspondingly change half
Conductor element.Here, explanation uses electric power with switch element 11 GaN transistor 34 of normal off (normally off)
Situation.That is, here, electric power switch element 11 is the field-effect transistor for including gallium nitride.GaN transistor 34 has sapphire
Substrate 35, buffer layer 36, undoped GaN layer 37, the undoped AlGaN layer 38 of N-shaped, p-type control layer 39, P type contact layer 40, absolutely
Edge layer 41, gate terminal 11G, drain terminal 11D and source terminal 11S.Buffer layer 36 is arranged at the one of sapphire substrate 35
Face.Undoped GaN layer 37 is arranged at the side opposite with sapphire substrate 35 relative to buffer layer 36.Undoped AlGaN layer
38 are arranged at the side opposite with buffer layer 36 relative to undoped GaN layer 37.Gate terminal 11G, drain terminal 11D and
Source terminal 11S is arranged at the side opposite with undoped GaN layer 37 relative to undoped AlGaN layer 38.In addition, being mixed non-
Between miscellaneous AlGaN layer 38 and gate terminal 11G, set gradually for realizing the p of normal off function from 38 side of undoped AlGaN layer
Type control layer 39 and P type contact layer 40.In turn, by insulating layer 41 covering be not configured gate terminal 11G, drain terminal 11D and
The surface of the undoped AlGaN layer 38 of source terminal 11S.
Here, if applying positive current potential to gate terminal 11G, so that the current potential and source terminal of gate terminal 11G
The current potential of 11S compares potential difference as defined in height or more, then is formed in the joint portion of p-type control layer 39 and undoped AlGaN layer 38
PN junction portion 33 biased along forward direction.Therefore, grid current flows to source terminal 11S from gate terminal 11G.At this point, in PN
Recombining for electronics occurs in knot 33, sends out the light of intensity corresponding with the grid current of flowing.In other words, it uses
The illumination region 18 of the electric power switch element 11 of GaN semiconductors sends out and is flowed to from gate terminal 11G the energization of source terminal 11S
The light of the corresponding intensity of electric current.Therefore, there are related to the current potential of gate terminal 11G for the electrical current flowed in PN junction portion 33
Property.
As a result, the luminous intensity by detecting illumination region 18, so as to detect cut-out (tum off) in early stage
What the current potential along with gate terminal 11G of period rose misquotes arc.
Therefore, as described above, in electric power switch element 11 due to having occurred from external noise and misquoting arc
When, illumination region 18 sends out the light for the influence for being difficult to the noise by electromagnetism.Moreover, generating and the light that is generated due to misquoting arc
The corresponding bias voltage of intensity.Bias voltage is fed into source terminal 11S during the disconnection level of control signal.By
This, bad influence that power transformation circuit 10 is subject to from noise is suppressed, and control circuit 16 can more accurately control electric power with opening
Close element 11.
Industrial applicibility
Power transformation circuit according to the present invention is difficult to be influenced by from external noise, and can inhibit perforation
Electric current.Therefore, electric power with switch element after being acted steadily in the long term, and electric power switch element being capable of the long-life
Change.That is, power transformation circuit according to the present invention is useful in electronic equipment of various.
Reference sign
10 power transformation circuits；
11 electric power switch elements；
11G gate terminals；
11D drain terminals；
11S source terminals；
12 driving circuits；
13 comparison circuits；
14 holding circuits；
15 light receiving circuits；
15A acceptance parts；
16 control circuits；
17A control terminals；
17B reference terminals；
18 illumination regions；
19 update diodes；
20 comparison signal electricity container；
20A high potential terminals；
20B terminals；
21 DC-to-AC converters；
22 Inverter output terminals；
23 update switches；
24 disconnect level switch；
27 turn-on levels switch；
28 comparators；
29 compare switch；
30 positive supplies；
31 negative supplies；
32 biasing resistors；
33 PN junction portions；
34 GaN transistors；
35 sapphire substrates；
36 buffer layers；
37 undoped GaN layers；
38 undoped AlGaN layers；
39 p-type control layers；
40 P type contact layers；
41 insulating layers.
Claims (7)
1. a kind of power transformation circuit, has：
Control circuit alternately sends cut-off signal repeatedly and connects signal；
Electric power switch element, with control terminal, reference terminal and the illumination region to shine according to electrical current；
Driving circuit is connect with the control terminal and the reference terminal, drives the electric power switch element；
Light receiving circuit receives the light generated by the illumination region, generates electric signal, that is, power on signal of the intensity based on the light；
With
There is holding circuit the comparison signal electricity container comprising high potential terminal, the holding circuit to be configured in the control
When circuit sends the cut-off signal, the high potential is not made to the charge of power on signal described in the high potential terminal feeding and
The voltage of terminal reduces, and is configured to when the control circuit sends the connection signal, not to the high potential terminal
It supplies the charge of the power on signal and maintains the voltage of the high potential terminal, which supplies the high potential terminal
Voltage as comparison signal；With
Comparison circuit is compared the comparison signal and reference signal, generates based on to the comparison signal and the base
The bias voltage of result obtained from calibration signal is compared, the bias voltage is fed back as the reference signal,
The driving circuit supplies the biased electrical when the control circuit sends the cut-off signal, to the reference terminal
Pressure.
2. power transformation circuit according to claim 1, wherein
The driving circuit makes the reference edge when the control circuit sends the cut-off signal according to the bias voltage
The current potential of son more rises than the current potential of the control terminal.
3. power transformation circuit according to claim 1, wherein
The holding circuit has：
Diode is updated, is connect with the light receiving circuit；With
Update switch configures between the cathode and the high potential terminal of the update diode,
The holding circuit is configured to when the control circuit sends the cut-off signal, is closed the update switch,
The holding circuit is configured to when the control circuit sends the connection signal, opens the update switch.
4. power transformation circuit according to claim 1, wherein
It is to have the control terminal as gate terminal and with the reference terminal as source that the electric power, which uses switch element,
The field-effect transistor of extreme son.
5. power transformation circuit according to claim 4, wherein
The electrical current is the drain current or grid current in the electric power switch element.
6. power transformation circuit according to claim 4, wherein
The illumination region is in the electric power switch element, is formed in PN junction portion between drain-source or between gate-source.
7. power transformation circuit according to claim 4, wherein
The electric power is the field-effect transistor for including gallium nitride with switch element.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016051766 | 2016-03-16 | ||
| JP2016-051766 | 2016-03-16 | ||
| PCT/JP2017/007654 WO2017159338A1 (en) | 2016-03-16 | 2017-02-28 | Power conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108781043A true CN108781043A (en) | 2018-11-09 |
| CN108781043B CN108781043B (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780016281.1A Active CN108781043B (en) | 2016-03-16 | 2017-02-28 | Power conversion circuit |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10439514B2 (en) |
| JP (1) | JP6671003B2 (en) |
| CN (1) | CN108781043B (en) |
| WO (1) | WO2017159338A1 (en) |
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|---|---|---|---|---|
| WO2018150789A1 (en) * | 2017-02-17 | 2018-08-23 | パナソニックＩｐマネジメント株式会社 | Switch circuit |
| US11758745B2 (en) * | 2019-04-18 | 2023-09-12 | Semiconductor Energy Laboratory Co., Ltd. | Solid-state relay and semiconductor device |
| US20230216402A1 (en) * | 2022-01-04 | 2023-07-06 | Nuvolta Technologies (Hefei) Co., Ltd. | Gate Drive Voltage Regulation Apparatus and Control Method |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20190260310A1 (en) | 2019-08-22 |
| JPWO2017159338A1 (en) | 2019-01-31 |
| WO2017159338A1 (en) | 2017-09-21 |
| JP6671003B2 (en) | 2020-03-25 |
| US10439514B2 (en) | 2019-10-08 |
| CN108781043B (en) | 2020-05-01 |
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